Followup to r40188: scan_addition() gives us all we need in a single iteration, so remove the looping. Also, read_info() might NOT give us what we need, so we'll have to scan for it.
Followup to r40188: scan_addition() gives us all we need in a single
iteration, so remove the looping. Also, read_info() might NOT give us what
we need, so we'll have to scan for it.

* subversion/libsvn_wc/node.c:
  (svn_wc__node_get_repos_info): remove the looping, add some comments,
    and make the info-fetching more robust

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion